In this study, a new method for predicting carbon and nitrogen contents of a carbonitrided surface using computational thermodynamics with Thermo-Calc was developed. The nitrogen content of alloyed steel, which is in equilibrium between the steel surface and the atmosphere, was predicted using the nitriding potentials and Thermo-Calc, and the experimental and calculated results were compared using pure iron. For lower nitrogen levels, the accuracy of prediction was sufficient. However, for higher nitrogen levels, the experimental nitrogen content was lower than the calculated value, which was attributed to pore formation. Through a comparison of the described method with the conventional one, it was confirmed that our novel prediction method exhibits sufficient accuracy to predict the nitrogen content following carbonitriding.

在这项研究中，开发了一种新的方法，该方法利用Thermo-Calc的计算热力学来预测碳氮共渗表面的碳和氮含量。利用渗氮势和Thermo-Calc预测了合金钢的氮含量，该含量在钢表面和大气之间处于平衡状态，并使用纯铁比较了实验结果和计算结果。对于较低的氮含量，预测的准确性已足够。但是，对于较高的氮含量，实验氮含量低于计算值，这归因于孔的形成。通过将上述方法与传统方法进行比较，可以确认我们的新型预测方法具有足够的准确性，可以预测碳氮共渗后的氮含量。